use local src file

package/fakeidentd/Makefile

@@ -4,15 +4,13 @@
 include ${ADK_TOPDIR}/rules.mk
 
 PKG_NAME:=		fakeidentd
-PKG_VERSION:=		2.5
+PKG_VERSION:=		2.6
 PKG_RELEASE:=		1
 PKG_HASH:=		696a57b58ede48c65b9c3743d3d96be70abf5406f0173964e4cd05dd6c8f0b90
 PKG_DESCR:=		secure ident daemon
 PKG_SECTION:=		net/misc
-PKG_SITES:=		http://distfiles.gentoo.org/distfiles/
 
-DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.bz2
-WRKDIST=		${WRKDIR}
+NO_DISTFILES:=		1
 
 include ${ADK_TOPDIR}/mk/package.mk
 
@@ -24,7 +22,7 @@ INSTALL_STYLE:=		manual
 
 do-build:
 	${TARGET_CC} ${TARGET_CPPFLAGS} ${TARGET_CFLAGS} ${TARGET_LDFLAGS} \
-		-o ${WRKBUILD}/fakeidentd ${WRKBUILD}/identd.c
+		-o ${WRKBUILD}/fakeidentd ${WRKBUILD}/fakeidentd-2.6.c
 
 do-install:
 	${INSTALL_DIR} ${IDIR_FAKEIDENTD}/usr/sbin

package/fakeidentd/src/fakeidentd-2.6.c

@@ -0,0 +1,916 @@
+#if 0 /* -*-  mode: c; c-file-style: "gnu"; tab-width: 8; -*-
+
+#   This program is easy to compile. For example the following ways:
+#       $ sh identd.c
+#       $ sh identd.c -g -DDEBUG
+#       $ sh identd.c -s -DXXXMULTI
+#       $ sh identd.c TRG=fake_identd -s -DBIND_ADDRESS=127.0.0.1
+#       $ sh identd.c CC=cc
+#       $ sh identd.c CC=egcs -s -fomit-frame-pointer
+
+set -eu
+
+CC= TRG=`basename "$0" .c` OIFS=$IFS
+for arg in "$@" ''
+do case $arg in	TRG=*) TRG=`echo "$arg" | sed 's/TRG=//'`; shift ;;
+		CC=*) CC=`echo "$arg" | sed 's/CC=//'`; shift ;;
+		clean) set -x; exec rm -f "$TRG" ;;
+		readme) set -x; exec sed -n '1,/[e]nd/d;/\*\//q;s/..//p' "$0";;
+		'') set 0 -s -O2; shift; break ;;
+		*) break ;;
+esac; done
+case `uname` in SunOS) L='-lsocket -lnsl' ;; *) L= ;; esac
+
+WARN="-Wall -Wstrict-prototypes -pedantic -Wno-long-long"
+WARN="$WARN -Wcast-align -Wpointer-arith " # -Wfloat-equal #-Werror
+WARN="$WARN -W -Wwrite-strings -Wcast-qual -Wshadow" # -Wconversion
+
+VERSION=`sed -n '/^ [*] Version / {
+	s/.*Version \([^ ]*\)  *\([^ ]*\).*./\1 (\2)/p; q; }' "$0"`
+case $VERSION in '') echo Could not read version information. >&2; exit 1; esac
+TRGNAME=`basename "$TRG"`
+set -x; exec ${CC:-gcc} $WARN "$@" -DTRG="\"$TRGNAME\"" \
+	-DVERSION="\"$VERSION\"" -o "$TRG" "$0" $L
+exit 1
+# */
+#endif
+/*
+ * identd.c 2.6  2012-05-31 20:37:27 UTC
+ *
+ * Author: Tomi Ollila -- too ät iki fi
+ *
+ * Created: Sat Nov 25 15:34:07 EET 1995 too
+ * Last modified: Thu 31 May 2012 23:37:27 EEST too
+ *
+ * This program is standalone 'fake' ident daemon. This program does
+ * not fork() but is configured to handle up to 20 concurrent connections.
+ * Since one connection should not last long, if all 20 connections are
+ * in use, the next connection will close the oldest connection data
+ * has been read. This way this program is not very vulnerable to so
+ * called `denial of service' attack, thus making this ideal "identd"
+ * to be used in a firewall, IP masquerading hosts etc.
+ *
+ * Program takes one (or many) arguments, which if exist, determines the
+ * `user' name(s) that is returned for successful ident query.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * HISTORY
+ *
+ * Version 2.6  2012-05-31 20:37:27 UTC
+ *   Applied patches from the wl500g project, including IPv6 support, with
+ *   minor tweaks (patches provided by Daniel Gimpelevich. Thanks).
+ *
+ * Version 2.5  $Id: identd.c 862 2006-05-18 14:16:34Z too $
+ *   Minor build and readme updates.
+ *
+ * Version 2.4  identd.c 568 2005-09-07 20:18:39Z too
+ *   More compilation warnings options set -- iov.base being non-const
+ *   gives warnings that are hard to avoid...
+ *
+ * Version 2.3  identd.c 564 2005-09-06 19:15:20Z too
+ *   Randident code from  Matthias Jung  tuned in.
+ *
+ * Version 2.2  identd.c 12 2004-09-08 21:46:54Z too
+ *   Fixed getservbyname() to look port for "auth" instead of "identd"
+ *   port. This "bug" also revealed port number byte order handling bug,
+ *   which was fixed.
+ *   Now this file is stored in subversion repository -- I entered
+ *   $ svn propset svn:keywords Id identd.c -- let's see how it works...
+ *   ... ``svn propset svn:keywords 'Id Rev' identd.c'' !!!
+ *
+ * Revision 2.1  2004/01/15 18:14:42  too
+ *   Made BIND_ADDRESS definable (in compiler command line).
+ *   Added some typecasts (using checked_cast() macro).
+ *   Thanks to Jeffrey D. Wheelhouse for his content.
+ *
+ * Revision 2.0  2003/05/05 15:21:01  too
+ *   Major update. Removed fdprintf(); replaced with use of
+ *   writev() and newly added outputstrings().
+ *   Removed many now obsolete defines and converted one to
+ *   constant character string.
+ *   Added one assert() (and left room for more). Did some
+ *   relativily small other adjustments.
+ *
+ * Revision 1.7  2002/09/29 07:50:20  too
+ *   No longer chops up to IDSTR_MAX chars, but uses "%.*s" to limit length;
+ *   now works also when XXXMULTI defined.
+ *   Back-hacked self-compilable trick, with more tricks to avoid compiler
+ *   warnings.
+ *   Removed own define of FD_SETSIZE altogether;
+ *   systems has it small to begin with.
+ *   Line '415' (or whatever that is now) fixed. () -> (void) in func def.
+ *   Some fine-tuning.
+ *   Thanks to Cristian for his patches.
+ *
+ * Revision 1.6.1  2002-09-28 12:30:29 +0200  cii
+ *   + added defines for IDSTR_MAX, IDENT_SUBSTR, IDSTR_BUFLEN and IDSTR_MAX
+ *     (length limit on the id-string)
+ *   + program arg 1 chopped after IDSTR_MAX characters (when applicable);
+ *     reason is:
+ *       - if the program is called with a relativelly long string as arg 1
+ *         (tested with about 400 chars), a segfault occurs due to an internal
+ *         buffer overflow (buffer space reserved for id-string is 128 chars,
+ *         but never verified)
+ *       - it may trigger buffer overflows in clients
+ *   + put a proper comment at the top of the file
+ *   + sorted out FD_SETSIZE (on Linux it's already defined)
+ *       - moved it down below all the includes
+ *   + added time.h include
+ *   + added some short comments
+ *   + conditionals '{', '}' enclosed
+ *   + variable index -> idx in function closeOldest (killed a warning)
+ *   + splitted multiple statements on a singel line
+ *   + splitted long lines
+ *   + prototypes ending in '()' -> '(void)'; changed by protoize
+ *   + corrected most warnings, but "function declaration isn't a prototype"
+ *     which still occurs on line: 415
+ *   + added IDENT_PORT
+ *   + added IDENT_SUBSTR
+ *
+ * Revision 1.6  2002/07/31 16:25:20  too
+ *   Now works when started as root (in Linux). Stupid me, tested
+ *   only starting as an ordinary loser.
+ *
+ * Revision 1.5  2002/07/29 14:02:42  too
+ *   Added possibility to have multible reply users, one (pseudo)randomly
+ *   chosen at each time.
+ *
+ * Revision 1.4  2001/02/09 08:45:42  too
+ *   Now GID is also changed to nobody/nogroup.
+ *
+ * Revision 1.3  2000/06/07 05:55:44  too
+ *   Fixed some Solaris compilation "bugs".
+ *   Changed LOG_PERROR to LOG_CONS
+ *
+ * Revision 1.2  1999/07/30 04:08:42  too
+ *   Added printing version string (and exit) with `-V' command line option.
+ *
+ * Revision 1.1  1999/04/21 17:23:20  too
+ * - Writes process id to /var/run/identd.pid.
+ * - Changes (effective) user id to `nobody' after initialization
+ *      (binding socket etc.).
+ * - Ignores some signals (HUP and PIPE).
+ * - Handles some signals that aborts by default. The handler function
+ *      tries to get rid of the pidfile.
+ *
+ * Revision 0.9b 1999/04/15 20:45:12  too
+ *   Not so much spaghetti anymore. Added documentation and more replies.
+ *
+ * Revision 0.9  1999/04/12 18:30:00  too
+ *   Version for unix systems. Standalone, supports 20 concurrent connections.
+ *   The code is quite a spaghetti. But that does not matter.
+ */
+
+#ifdef DEBUG
+#undef ndebug
+#else
+#define ndebug 1
+#endif
+
+#include <assert.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <syslog.h>
+
+#include <pwd.h>
+#include <netdb.h>
+
+#include <sys/syslog.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <sys/uio.h>
+
+#include <endian.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+
+#define IPADDR(a,b,c,d) ((in_addr_t)((a << 24) + (b << 16) + (c << 8) + d))
+#define IPPORT(v) ((in_port_t)v)
+#define A_x_256(a)((a<<8))
+
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+
+#define IPADDR(a,b,c,d) (a + (b << 8) + (c << 16) + (d << 24))
+#define IPPORT(v) ((in_port_t)((v >> 8) | (v << 8)))
+#define A_x_256(a) (a)
+
+#else
+#error unknown ENDIAN
+#endif
+
+#ifndef __STRING
+#define __STRING(x) #x
+#endif
+/* Let's see how long-lived this is... */
+#define __STRINGIFY_MACRO(x) __STRING(x)
+
+#ifndef BIND_ADDRESS
+#define BIND_ADDRESS	0.0.0.0
+#endif
+#ifndef BIND_ADDRESS6
+#define BIND_ADDRESS6	::
+#endif
+#define IDENT_PORT	113
+#define MAXCONNS	20
+#define MAXIDLETIME	45
+
+#ifndef USE_UNIX_OS
+static const char ident_substr[] = " : USERID : OTHER : ";
+#else
+static const char ident_substr[] = " : USERID : UNIX : ";
+#endif
+static const int ident_substr_len = sizeof ident_substr - 1;
+
+#if !defined __cplusplus
+typedef enum { false = 0, true = 1 } bool;
+#endif
+
+#if (__GNUC__ >= 3)
+#define GCCATTR_UNUSED	 __attribute ((unused))
+
+#define from_type(ft, v) \
+  __builtin_choose_expr (__builtin_types_compatible_p (typeof (v), ft), \
+			 (v), (void)0)
+
+#define checked_cast(ft, tt, v) \
+  __builtin_choose_expr (__builtin_types_compatible_p (typeof (v), ft), \
+			 ((tt)(v)), (void)0)
+#else
+#define GCCATTR_UNUSED
+
+#define from_type(ft, v) (v)
+#define checked_cast(ft, tt, v) ((tt)(v))
+#endif
+
+/* ... */
+#define CVP (const void *)
+
+#ifndef DEBUG
+#define FCS		2	/* First Connection Socket */
+#define TRACE(x, y);
+#else
+#define FCS		4
+#define TRACE(x, y)	if (x) printf y
+#endif
+
+/* descriptors when debugging:
+ *  0 = server socket
+ *  1 = standard output (debugging output)
+ *  2 = standard error
+ *  3 = syslog fd (hopefully -- otherwise may work a bit wierdly)
+ *  4 - 4 + MAXCONNS = connection sockets
+ *
+ * descriptors when not debugging
+ *  0 = server socket
+ *  1 = syslog fd (hopefully -- otherwise this won't work)
+ *  2 = connection socket after detached from tty. standard error before that
+ *  3 - 2 + MAXCONNS = rest connection sockets
+ *
+ * To try to make sure that syslog fd is what is "requested", the that fd
+ * is closed before openlog() call. It can only severely fail if fd 0
+ * is initially closed.
+ */
+
+/*
+ * FD of the connection is always the index of the connection structure
+ * in `conns' array + FCS
+ */
+struct {
+  char		buf[20];
+  int		len;
+  time_t	lasttime;
+} conns[MAXCONNS];
+
+
+/*
+ * To support multible usernames that can be replied by this fake identd
+ * define `XXXMULTI' in compilation command line. This doesn't look guite
+ * pretty, but alternatives looks even uglier.
+ * XXX NOTE: multi currently only slightly tested XXXX.
+ */
+#ifdef XXXMULTI
+#define IU_IN_STRUCT const char * const * identuserlist; int identusers
+#define SET_IU(s, c) do { G.identuserlist = &(s); G.identusers = c; } while (0)
+#define IU_IN_USAGESTR "[identuser [identuser2...]]"
+#else
+#define IU_IN_STRUCT const char * identuser
+#define SET_IU(s, c) G.identuser = (s)
+#define IU_IN_USAGESTR "[identuser]"
+#endif
+
+/* When using global variables, bind those at least to a structure. */
+struct {
+  IU_IN_STRUCT;
+  fd_set	readfds;
+  int		conncnt;
+  bool		randident;
+} G;
+
+/*
+ * Prototypes
+ */
+static void reply(int s, char * buf);
+static void replyError(int s, const char * buf);
+static const char * strerrno(void);
+
+static const int one = 1;
+static const char * const nobodystr = "nobody";
+static const char * alphanum =
+  "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+static inline void movefd(int from, int to)
+{
+  TRACE(1, ("movefd(from = %d, to = %d)\n", from, to));
+  if (from != to)
+    {
+      dup2(from, to);
+      close(from);
+    }
+}
+
+/*
+ * inetbind() must always return 0 or value < 0.
+ * ... i.e. this version -- saves need for storage of the return value.
+ */
+
+#if 0 /* unused */
+static int inetbind(int port)
+{
+  return inetbind(htons(port));
+}
+#endif
+
+static int inetbind(int ipport)
+{
+  int s, len;
+  union {
+    struct sockaddr_in	sin4;
+    struct sockaddr_in6 sin6;
+  } addr;
+
+  close(0);
+  memset(&addr, 0, sizeof addr);
+
+  if ((s = socket(AF_INET6, SOCK_STREAM, 0)) >= 0)
+    {
+      len = sizeof addr.sin6;
+      inet_pton(AF_INET6, __STRINGIFY_MACRO(BIND_ADDRESS6), &addr.sin6.sin6_addr);
+      addr.sin6.sin6_family = AF_INET6;
+      addr.sin6.sin6_port = ipport;
+    }
+  else
+  if ((s = socket(AF_INET, SOCK_STREAM, 0)) >= 0)
+    {
+      len = sizeof addr.sin4;
+      addr.sin4.sin_addr.s_addr = inet_addr(__STRINGIFY_MACRO(BIND_ADDRESS));
+      addr.sin4.sin_family = AF_INET;
+      addr.sin4.sin_port = ipport;
+    }
+  else
+    {
+      syslog(LOG_CRIT, "Can not create server socket: %s.", strerrno());
+      return -1;
+    }
+
+  setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
+
+  if (bind(s, (struct sockaddr *)&addr, len) < 0)
+    {
+      syslog(LOG_CRIT, "Can not bind() server socket: %s.", strerrno());
+      return -1;
+    }
+
+  if (listen(s, 5) < 0)
+    {
+      syslog(LOG_CRIT, "Can not listen() server socket: %s.", strerrno());
+      return -1;
+    }
+
+  movefd(s, 0);
+
+  return 0;
+}
+
+static void deleteConn(int s)
+{
+  int i = s - FCS;
+
+  TRACE(1, ("deleteConn(): socket %d, conncnt %d\n", s, G.conncnt));
+
+  close(s);
+
+  G.conncnt--;
+
+  /*
+   * Most of the time there is 0 connections. Most often that there
+   * is connections, there is just one connection. When this one connection
+   * closes, i == G.conncnt = 0 -> no copying.
+   * When there is more than one connection, the oldest connections closes
+   * earlier on average. When this happens, the code below starts copying
+   * the connection structure w/ highest index to the place which which is
+   * just deleted. This means that the connection structures are no longer
+   * in chronological order. I'd quess this means that when there is more
+   * than 1 connection, on average every other connection structure needs
+   * to be copied over the time all these connections are deleted.
+   */
+  if (i != G.conncnt)
+    {
+      memcpy(&conns[i], &conns[G.conncnt], sizeof conns[0]);
+      movefd(G.conncnt + FCS, s);
+    }
+
+  TRACE(1, ("Clearing fd %d, readfds now 0x%x\n\n",
+	    G.conncnt + FCS, *(int *)&G.readfds));
+
+  FD_CLR(G.conncnt + FCS, &G.readfds);
+}
+
+static int closeOldest(void)
+{
+  time_t min = conns[0].lasttime;
+  int	 idx = 0;
+  int	 i;
+
+  for (i = 1; i < MAXCONNS; i++)
+    if (conns[i].lasttime < min)
+      idx = i;
+
+  TRACE(1, ("closeOldest(): index %d, socket %d\n", idx, idx + FCS));
+
+  replyError(idx + FCS, "X-SERVER-TOO-BUSY");
+  close(idx + FCS);
+
+  return idx;
+}
+
+
+static int checkInput(char * buf, int len, int l)
+{
+  int	i;
+
+  for (i = len; i < len + l; i++)
+    if (buf[i] == '\n')
+      return 1;
+
+  return 0;
+}
+
+
+static int getport(void)
+{
+  struct servent * se;
+
+  if ((se = getservbyname("auth", "tcp")) == NULL)
+    return IPPORT(IDENT_PORT);
+  else
+    return se->s_port;
+}
+
+static const char * strerrno()
+{
+#if 1
+  return strerror(errno);
+#else
+  extern char * sys_errlist[];
+  return sys_errlist[errno];
+#endif
+}
+
+#define WriteCS(f, s) write(f, s, sizeof s - 1)
+
+static void writestrings(int fd, const char * str, ...)
+{
+  va_list ap;
+
+  va_start(ap, str);
+
+  while (str)
+    {
+      write(fd, str, strlen(str));
+      str = va_arg(ap, const char *);
+    }
+  va_end(ap);
+}
+
+#ifndef DEBUG
+static void godaemon(void)
+{
+  switch(fork())
+    {
+    case -1:	exit(-1);
+    case 0:	close(1); close(2); setsid();  break;
+    default:	exit(0);
+    }
+}
+#endif
+
+#ifdef TRG
+#define PIDFILE "/var/run/" TRG ".pid"
+#else
+#define PIDFILE "/var/run/identd.pid"
+#endif
+
+static void delpidfile(void)
+{
+  /*
+   * Usually nobody has no write/delete access to directory /var/run/
+   * therefore if file cannot be deleted, it is truncated
+   */
+  if (unlink(PIDFILE) < 0)
+    close(open(PIDFILE, O_WRONLY|O_CREAT|O_TRUNC, 0644));
+}
+
+static void handlexitsigs(void)
+{
+  delpidfile();
+  exit(0);
+}
+
+static void writepid(uid_t nobody, uid_t nogrp)
+     /* May succeed. If not, won't care. */
+{
+  int fd = open(PIDFILE, O_WRONLY|O_CREAT|O_TRUNC, 0664);
+  char buf[24];
+
+  if (fd < 0)
+    return;
+
+  /* we don't use snprintf() here since it is not so portable...*/
+  /* Anyway, 64-bit integer is at max 20 characters long. */
+  sprintf(buf, "%d\n", getpid());
+  buf[23] = '\0';
+  write(fd, buf, strlen(buf));
+  fchown(fd, nobody, nogrp);
+  close(fd);
+
+  signal(SIGTERM, (void(*)(int))handlexitsigs);
+  signal(SIGINT, (void(*)(int))handlexitsigs);
+  signal(SIGQUIT, (void(*)(int))handlexitsigs);
+  /* should this handle ILL, ... (see signal(7)) */
+}
+
+static void printversion(void)
+{
+  struct iovec iv[4];
+
+  iv[0].iov_base = TRG;
+  iv[0].iov_len = sizeof TRG - 1;
+
+  iv[1].iov_base = " ";
+  iv[1].iov_len = 1;
+
+  iv[2].iov_base = VERSION;
+  iv[2].iov_len = sizeof VERSION - 1;
+
+  iv[3].iov_base = ".\n";
+  iv[3].iov_len = 2;
+
+  writev(1, iv, 4);
+}
+
+int main(int argc GCCATTR_UNUSED, const char * argv[])
+{
+  uid_t nobody, nogrp;
+
+  memset(conns, 0, sizeof conns);
+  memset(&G, 0, sizeof G);
+  FD_ZERO(&G.readfds);
+  FD_SET(0, &G.readfds);
+
+  TRACE(1, ("s: `%s', l = %d\n", ident_substr, ident_substr_len));
+
+  if (argv[1])
+    if (argv[1][0] == '-') {
+      if (argv[1][1] == 'V')
+	{
+	  printversion();
+	  return 0;
+	}
+      else
+	{
+        if (argv[1][1] == 'r')
+	  {
+	    G.randident = true;
+	    srand(time(0));
+	  }
+	else
+	  {
+            char b[2]; b[0] = argv[1][1]; b[1]= '\0';
+
+            writestrings(2, argv[0], ": invalid option -- ", b, ".\n",
+                         "Usage: ", argv[0], " [-rV] ", IU_IN_USAGESTR "\n",
+                         NULL);
+            return 1;
+	  }
+	}}
+    else
+      SET_IU(argv[1], argc - 1);
+  else
+    SET_IU(nobodystr, 1);
+
+
+#ifndef DEBUG
+  close(1); /* not debugging, openlog() hopefully uses fd 1. */
+#else
+  close(3); /* debugging, TRACE uses fd 1, openlog() hopefully fd 3 */
+#endif
+
+  openlog("identd", LOG_CONS, LOG_DAEMON);
+
+  {
+    struct passwd * pw = getpwnam(nobodystr);
+
+    if (pw)
+      {
+	nobody = pw->pw_uid;
+	nogrp = pw->pw_gid;
+      }
+    else
+      {
+	syslog(LOG_CRIT, "Can not find user `nobody': %s,", strerrno());
+	return -1;
+      }
+  }
+
+  if (inetbind(getport()) < 0)
+      return -1;
+
+  /* */
+  {
+    int i;
+
+    for (i = FCS; i < MAXCONNS + FCS; i++)
+      close(i);
+  }
+
+#ifdef DEBUG
+#ifndef LOG_PERROR
+#define LOG_PERROR 0
+#endif
+  openlog("identd", LOG_PERROR, LOG_DAEMON);
+#else /* not DEBUG */
+  godaemon();
+  openlog("identd", 0, LOG_DAEMON);
+  close(2);
+  signal(SIGHUP, SIG_IGN);
+#endif /* DEBUG */
+
+  signal(SIGPIPE, SIG_IGN); /* connection closed when writing (raises ???) */
+
+  writepid(nobody, nogrp);
+
+  setegid(nogrp); setgid(nogrp); setuid(nobody); seteuid(nobody);
+
+  {
+    int i;
+
+    for (i = 0; i < 4; i++)
+      {
+	const char *	id = NULL;
+	unsigned int	rv = 0;
+
+	switch (i)
+	  {
+	  case 0: rv = (unsigned int)getegid(); id = "egid"; break;
+	  case 1: rv = (unsigned int)getgid();  id = "gid";  break;
+	  case 2: rv = (unsigned int)geteuid(); id = "euid"; break;
+	  case 3: rv = (unsigned int)getuid();  id = "uid";  break;
+	  }
+
+	if (rv == 0)
+	  {
+	    syslog(LOG_ERR,
+		   "Can not drop all root privileges (%s) !!! %s !!!",
+		   id, strerrno());
+	    delpidfile();
+	    return -1;
+	  }
+      }
+  }
+
+  while (2)
+  {
+    fd_set		rfds = G.readfds;
+    struct timeval	tv = { 15, 0 };
+    int			i;
+    int			tim = time(NULL);
+
+    TRACE(1, ("calling select(): n = %d, rfds = 0x%x\n\n",
+	      G.conncnt + FCS, *(int *)&rfds));
+
+    select(G.conncnt + FCS, &rfds, NULL, NULL, G.conncnt? &tv: NULL);
+
+    for (i = G.conncnt - 1; i >= 0; i--)
+      {
+	int s = i + FCS;
+
+	if (FD_ISSET(s, &rfds))
+	  {
+	    char *		buf = conns[i].buf;
+	    unsigned int	len = conns[i].len;
+	    unsigned int	l;
+
+	    TRACE(1, ("data socket fd_isset %d\n", s));
+
+	    if ((int)(l = read(s, buf + len, sizeof conns[0].buf - len)) > 0)
+	      {
+		if (checkInput(buf, len, l))
+		  {
+		    reply(s, buf);
+		    goto deleteconn;
+		  }
+		else if (len + l >= sizeof conns[0].buf)
+		  {
+		    replyError(s, "X-INVALID-REQUEST");
+		    goto deleteconn;
+		  }
+		else
+		  conns[i].len += l;
+	      }
+	    else
+	      goto deleteconn;
+
+	    conns[i].lasttime = tim;
+	    continue;
+
+	  deleteconn:
+	    deleteConn(s);
+	  }
+	else
+	  {
+	    /* implement as time_after() in linux kernel sources ... */
+	    if (conns[i].lasttime + MAXIDLETIME <= tim)
+	      {
+		replyError(s, "X-TIMEOUT");
+		deleteConn(s);
+	      }
+	  }
+      }
+
+    if (FD_ISSET(0, &rfds))
+      {
+	int s = accept(0, NULL, 0);
+
+	TRACE(1, ("server socket fd_isset, %d accepted\n", s));
+
+	if (s < 0)
+	  {
+	    if (errno != EINTR) /* EINTR */
+	      syslog(LOG_ERR, "accept: %s", strerrno());
+	  }
+	else
+	  {
+	    if (G.conncnt == MAXCONNS)
+	      i = closeOldest();
+	    else
+	      i = G.conncnt++;
+
+	    movefd(s, i + FCS); /* move if not already there */
+
+	    FD_SET(i + FCS, &G.readfds);
+
+	    conns[i].len = 0;
+	    conns[i].lasttime = time(NULL);
+	  }
+      }
+  }
+}
+
+static int parseAddrs(char * ptr, char ** myaddr, char ** heraddr);
+
+static void replyError(int s, const char * buf)
+{
+  struct iovec iv[3];
+
+  iv[0].iov_base = "0, 0 : ERROR : ";	iv[0].iov_len = 15;
+  iv[1].iov_base = buf;			iv[1].iov_len = strlen(buf);
+  iv[2].iov_base = "\r\n";		iv[2].iov_len = 2;
+
+  writev(s, iv, 3);
+}
+
+static void reply(int s, char * buf)
+{
+  char * myaddr, *heraddr;
+
+  myaddr = heraddr = NULL;
+
+  if (parseAddrs(buf, &myaddr, &heraddr))
+    replyError(s, "X-INVALID-REQUEST");
+  else
+    {
+      struct iovec iv[6];
+#ifdef XXXMULTI
+      const char * iul = G.identuserlist[random() % G.identusers];
+#endif
+
+      iv[0].iov_base = myaddr;		iv[0].iov_len = strlen(myaddr);
+      iv[1].iov_base = ", ";		iv[1].iov_len = 2;
+      iv[2].iov_base = heraddr;		iv[2].iov_len = strlen(heraddr);
+      iv[3].iov_base = checked_cast(const char[], void *, ident_substr);
+      iv[3].iov_len = ident_substr_len;
+#ifdef XXXMULTI
+      iv[4].iov_base = checked_cast(const char *, void *, iul);
+      iv[4].iov_len = strlen(iul);
+#else
+      if (G.randident)
+	{
+	  /* generate random string as reply: */
+	  int i;
+	  char randomstring[8];
+	  int randlen = (random() % 6) + 3; /* random string length 3-8 */
+
+	  /* have first char letter... */
+	  randomstring[0] = alphanum[10 + random() % 52];
+
+	  for (i = 1; i < randlen; i++)
+	    randomstring[i] = alphanum[random() % 62];
+
+	  iv[4].iov_base = checked_cast(char [], void *, randomstring);
+	  iv[4].iov_len = randlen;
+	}
+      else
+	{
+          /* use usual behaviour */
+          iv[4].iov_base = checked_cast(const char *, void *, G.identuser);
+          iv[4].iov_len = strlen(G.identuser);
+	}
+#endif
+      iv[5].iov_base = "\r\n";	iv[5].iov_len = 2;
+
+      writev(s, iv, 6);
+    }
+}
+
+static int chmatch(char c, const char * chars)
+{
+  for (; *chars; chars++)
+    if (c == *chars)
+      return 1;
+
+  return 0;
+}
+
+static int skipchars(char ** p, const char * chars)
+{
+  while (chmatch(**p, chars))
+    (*p)++;
+
+  if (**p == '\r' || **p == '\n')
+    return 0;
+
+  return 1;
+}
+
+static int parseAddrs(char * ptr, char ** myaddr, char ** heraddr)
+{
+  /* parse <port-on-server> , <port-on-client> */
+
+  if (! skipchars(&ptr, " \t"))
+    return -1;
+
+  *myaddr = ptr;
+
+  if (! skipchars(&ptr, "1234567890"))
+    return -1;
+
+  if (! chmatch(*ptr, " \t,"))
+    return -1;
+
+  *ptr++ = '\0';
+
+  if (! skipchars(&ptr, " \t,") )
+    return -1;
+
+  *heraddr = ptr;
+
+  skipchars(&ptr, "1234567890");
+
+  if (! chmatch(*ptr, " \n\r"))
+    return -1;
+
+  *ptr = '\0';
+
+  return 0;
+}
+
+/* EOF */